Optical fiber Fabry-Perot cavities and recirculating delay lines as tunable microwave filters

The radio frequency or microwave responses of single-mode fiber Fabry-Perot cavities and recirculating delay lines are studied. It is shown that fiber Fabry-Perot cavities may be used as bandpass filters and the recirculating delay lines as bandstop filters at radio or microwave frequencies. These electric filters are tunable by electrooptic effects since the bandpass or bandstop characteristic changes when the cavity or the delay line length is varied by a few tenths of an optical wavelength. The ultimate limit on speed of tuning is set by the coherence time of the light source. The dependence of the filter responses on the spectral purity of light is studied. Examples are given to illustrate the tunability of these electric filters. The availability of various components required to build the tunable RF or microwave filters is reviewed. >

[1]  H. J. Shaw,et al.  Coherent optical fibre delay-line processor , 1986 .

[2]  Ikuo Mito,et al.  Recent advances in frequency tunable DFB-DBR lasers , 1988 .

[4]  C L Chen,et al.  Optical fiber Fabry-Perot sensors. , 1988, Applied optics.

[5]  W. K. Burns,et al.  Polarization characteristics of single-mode fiber couplers , 1982 .

[6]  I. Giles,et al.  Dynamic response of an all-fiber ring resonator. , 1988, Optics letters.

[7]  R. Jones,et al.  A New Calculus for the Treatment of Optical SystemsII. Proof of Three General Equivalence Theorems , 1941 .

[8]  H. J. Shaw,et al.  Filter response of single-mode fibre recirculating delay lines , 1982 .

[9]  Yasuhiko Arakawa,et al.  Theory of gain, modulation response, and spectral linewidth in AlGaAs quantum well lasers , 1985 .

[10]  Y. Ohtsuka,et al.  Optical coherence effects on a fiber-sensing Fabry-Perot interferometer. , 1982, Applied optics.

[11]  Henry F. Taylor,et al.  Interferometric optical fibre sensors using internal mirrors , 1988 .

[12]  John E. Bowers,et al.  InGaAs PIN photodetectors with modulation response to millimetre wavelengths , 1985 .

[13]  J. Goodman,et al.  Optical fiber delay line signal processing , 1984 .

[14]  H J Shaw,et al.  All-single-mode fiber resonator. , 1982, Optics letters.

[15]  J. Goodman,et al.  Fiber-optic lattice signal processing , 1984, Proceedings of the IEEE.

[16]  Jiangde Peng,et al.  Fibre ring resonator with finesse of 1260 , 1988 .

[17]  A. Yariv,et al.  Ultra-high speed semiconductor lasers , 1985 .

[18]  A. Yariv,et al.  Time-dependent analysis of a fiber-optic passive-loop resonator. , 1986, Optics letters.

[19]  D. Marcuse,et al.  Ultrahigh finesse fiber Fabry-Perot interferometers , 1986 .

[20]  D. M. Bloom,et al.  20‐GHz bandwidth GaAs photodiode , 1983 .

[21]  H. F. Taylor,et al.  Fibre-optic delay-line devices for r.f. signal processing , 1977 .

[22]  Hiroshi Haga,et al.  LiNbO 3 traveling-wave light modulator/switch with an etched groove , 1986 .

[23]  Yasushi Matsui,et al.  Narrow spectral linewidth integrated-passive-cavity laser , 1988 .

[24]  D.E.N. Davies,et al.  Fibre-optic tapped delay line filter employing coherent optical processing , 1984 .

[25]  Y. Ohtsuka,et al.  Analysis of a fiber-optic passive loop-resonator gyroscope: Dependence on resonator parameters and light-source coherence , 1985 .